Shulou(Shulou.com)06/01 Report--

This article mainly introduces how to achieve short circuit JavaScript, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor with you to understand.

Short circuit

Logical operators in Javascript and (& &) can cause a short circuit, such as

Console.log (true & & 0 & & 2) / / 0console.log (true & & 'test' & & 2) / / 2

That is, the code will not continue to run from left to right if it encounters a value that undefined,null,0 and so on will be converted to false.

X = = 0 & & foo () / / equivalent to if (x = = 0) {foo ()} Thank you for reading this article carefully. I hope the article "how to achieve short Circuit in JavaScript" shared by the editor will be helpful to you. At the same time, I also hope that you will support and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

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